Dennis, the purpose of the twisting is to manipulate the layers of steel to produce the desired pattern, it doesn't affect the performance. This is a variation of the basic twist pattern, where you twist a single bar. Another twist pattern I like is turkish twist. Here's an example of that pattern:

Here's what I got done this morning. First, I ground the bar clean. When twisting a square bar, you make deep grooves, almost like screw threads. The bottoms of those grooves can get forged into the surface, and if you don't grind them out before final forging, you might be in trouble.

Then I started drawing out the tang:

Then the blade part is drawn out width-wise. I was shooting for a finished width of 3/4", so I want it a bit wider to allow for grinding:

Now the whole thing is thermal cycled a few times. This relieves stress and refines the grain.

Phillip, I see you are making a tanged chisel this time. I've been wondering up to this point whether it would have a tang or a socket. If you have also made socket chisels, would you post a few pictures? I'd be very curious to know whether you would forge or lathe a socket. Many thanks for this excellent demonstration.Patrick

Then I price everything out and realize I don't even have enough hours in the day to do half the things I've already got on my wish list, and figure I should just enjoy watching other talented individuals work.

Phillip, I see you are making a tanged chisel this time. I've been wondering up to this point whether it would have a tang or a socket. If you have also made socket chisels, would you post a few pictures? I'd be very curious to know whether you would forge or lathe a socket. Many thanks for this excellent demonstration.Patrick

I haven't made any socket chisels yet. If I did, I'd probably try to forge it close to shape, and use a guide for grinding and filing the rest of the way.

but didn't like the way it felt, so I ground it off. The spacer in the handle is a different kind of bronze than the ferrule, and is very hard to machine, so all the shaping after the above pics, were done free hand on the belt grinder.

After rough shaping, it was sanded with slack belts through 600 grit, then buffed:

That is beautifull work Phillip . This is by far the best thread of the challenge LOL

_________________The Shallower the depth of the stream , The Louder the Babble ! The Taking Of Offense Is the Life Course Of The Stupid One !Wanna Leave a Better Planet for our Kids? How about Working on BETTER KIDS for our Planet !Forgiveness is the ability to accept an apology that you will probably NEVER GETThe truth will set you free , But FIRST, it will probably Piss you Off !Creativity is allowing yourself to make Mistakes, Art is knowing which ones to Keep !The Saddest thing anyone can do , is push a Loyal Person to the point that they Dont Care AnymoreNever met a STRONG person who had an EASY past !http://wiksnwudwerks.blogspot.com/http://www.facebook.com/groups/GatewayA ... rAssembly/

Well, I didn't get around to heat treating until Friday, because I wanted to get a bunch of knife blades ready to do at the same time, to conserve energy. So here's the chisel:

and here are the knives I did:

The gray coating you see is anti scale compound. It protects the surface from the effects of oxygen at high temps.

Here it is after quenching. The steels I used for the chisel are shallow hardening, so require a fast quenchant. Traditionally, this was done in the urine of a red headed virgin, but it's hard to find virgins nowadays, so I use a quench oil designed for fast steels. It's almost as fast as water, but without the risk of cracking, which would be very disgusting this far along...

After tempering, which is done twice at 350 degrees for a couple hours, it's back to the grinder to clean up the grinds, trying to make everything symmetrical and straight:

I finished up on the grinder with 240 grit, then went to 400 grit by hand:

Then into the etching tank. I etch in ferric chloride. I like a fairly weak solution, because I think it looks nicer to do many slow etches, with light sanding in between, than to do a couple deep etches.

I etch for 10 minutes, and here's how it looks:

Then sand with 600 grit, etch for 10 more minutes, then buff with a fairly hard wheel and green chrome compound:

Then etch for another 10 minutes, then it goes into the neutralizing bath, which is just water and baking soda.

I think you might make more money by building custom guitar chisels for luthiers ! Amazing work Phillip .

_________________The Shallower the depth of the stream , The Louder the Babble ! The Taking Of Offense Is the Life Course Of The Stupid One !Wanna Leave a Better Planet for our Kids? How about Working on BETTER KIDS for our Planet !Forgiveness is the ability to accept an apology that you will probably NEVER GETThe truth will set you free , But FIRST, it will probably Piss you Off !Creativity is allowing yourself to make Mistakes, Art is knowing which ones to Keep !The Saddest thing anyone can do , is push a Loyal Person to the point that they Dont Care AnymoreNever met a STRONG person who had an EASY past !http://wiksnwudwerks.blogspot.com/http://www.facebook.com/groups/GatewayA ... rAssembly/

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